to really hit things off for much of the year.

"Zac met Vanessa while she was an employee at the Byron Bay General Store & Cafe in June," a source told Us Weekly. "Things moved quickly, and Vanessa spends most nights at Zac's house. They are both very smitten with each other."

In September, the couple was seen sharing some PDA while out in Byron Bay, and also went on an Australian ski vacation together this summer.

"Zac and Vanessa looked like the real deal," a source told The Sun. "They were besotted with each other. So once he decided to stay in Australia long term, he suggested they buy their first home. They'd started to look at a few places but, sadly, fate wasn't on their side. Zac's work and the ­­enforced distance has really taken its toll." The source continued, adding that there might not be much of a chance for a reunion: "Friends hope they can reunite, but it seems their relationship was more like a holiday romance than they cared to admit."

The source said that Efron had suggested that he and Valladares, who works as both a model and restaurant employee, buy a house together at one point: "They'd started to look at a few places but, sadly, fate wasn't on their side. Zac's work and the ­­enforced distance has really taken its toll."